Hydrothermally extraction of saponin from root - Physico-chemical characteristics and antibacterial activity evaluation.

Saponin was extracted from root under subcritical water conditions, and effects of root powder and pH of the solution were evaluated on the concentration of the saponin as manifested in its foamability and antioxidant activity using RSM. FT-IR analysis indicated that root extract had 2 main functional groups (hydroxyl and amide I groups). Saponin with the highest foam height (4.